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Solar Wind Ionic Charge States During the Ulysses Pole-to-Pole Pass

Ko, Yuan-Keun and Gloeckler, George and Cohen, Christina M. S. and Galvin, Antoinette B. (1999) Solar Wind Ionic Charge States During the Ulysses Pole-to-Pole Pass. Journal of Geophysical Research A, 104 (A8). pp. 17005-17020. ISSN 0148-0227. https://resolver.caltech.edu/CaltechAUTHORS:20150218-135137665

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Abstract

We analyze and compare the ionic charge composition data for different types of the solar wind (slow wind from equatorial regions, fast wind from low-latitude coronal hole and fast wind from both south and north polar coronal hole) which the Solar Wind Ion Composition Spectrometer (SWICS) on Ulysses observed during the pole-to-pole pass of its primary mission. The implications on the electron temperature, electron density, and ion outflow velocity from the corresponding solar wind source regions are also discussed. We find that the electron temperature in the source region of the slow solar wind is higher than that in the coronal hole. We also find a possible north-south asymmetry in the electron temperature that may be correlated to the northsouth asymmetry in the solar wind speed found in the SWOOPS/Ulysses data. In particular, we make extensive discussions on the latitudinal variations in the polar coronal hole. On the basis of our data without clear constraints from other coronal observations, the preliminary result is that the electron density may be higher, or the heavy ion outflow velocities may be lower toward lower heliographic latitude.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1029/1999JA900112DOIArticle
http://onlinelibrary.wiley.com/doi/10.1029/1999JA900112/abstractPublisherArticle
ORCID:
AuthorORCID
Cohen, Christina M. S.0000-0002-0978-8127
Galvin, Antoinette B.0000-0003-3752-5700
Additional Information:© 1999 American Geophysical Union. Paper number 1999JA900112. (Received April 6, 1998; revised February 24, 1999; accepted February 24, 1999.) This work is supported by NASA/JPL contract 955460 and NAG 5-2810. Janet G. Luhmann thanks Rudolf von Steiger and another referee for their assistance in evaluating this paper
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
NASA/JPL955460
NASANAG 5-2810
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1999-56
Issue or Number:A8
Record Number:CaltechAUTHORS:20150218-135137665
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150218-135137665
Official Citation:Ko, Y.-K., G. Gloeckler, C. M. S. Cohen, and A. B. Galvin (1999), Solar wind ionic charge states during the Ulysses pole-to-pole pass, J. Geophys. Res., 104(A8), 17005–17019, doi:10.1029/1999JA900112.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54952
Collection:CaltechAUTHORS
Deposited By: Deborah Miles
Deposited On:24 Feb 2015 23:13
Last Modified:03 Oct 2019 08:02

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